Components of Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2021

Equity [Abstract]

Changes in Accumulated Other Comprehensive Loss

The following table details changes in amounts included in our accumulated other comprehensive loss (AOCL) by component on our Condensed Consolidated Balance Sheets, net of tax:

	Three Months Ended March 31,
(in thousands)	2021			2020
Pension Plans
Balance at beginning of period	$	79,025		$	117,028
Amounts arising during the period		—			19,402
Effect of pension settlement		—			(31,811	)
Amounts reclassified from AOCL to earnings		(2,770	)		(3,095	)
Balance at end of period	$	76,255		$	101,524
Other Postretirement Benefit Plans
Balance at beginning of period	$	14,783		$	10,331
Amounts reclassified from AOCL to earnings		(183	)		(74	)
Balance at end of period	$	14,600		$	10,257
Cash Flow Hedges
Balance at beginning of period	$	27,181		$	20,000
Amounts arising during the period		(61,875	)		39,363
Amounts reclassified from AOCL to earnings		(2,232	)		(838	)
Balance at end of period	$	(36,926	)	$	58,525
Accumulated other comprehensive loss, end of period	$	53,929		$	170,306